Centrifugal pump and compressor.



PATENTED'JUNB 9, 190s. .0. w. WEISS. V GENTRIFUGAL PUMP AND ooMPRBssoB.

N0 MODEL.

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Patented June 9, 1903.

PATENT.' OFFICE.

CARL lV. WEISS, OF NEV YORK, N. Y.

CPNTRIFUGAL PUMP AND COMPRESSOR.

SPECIFICATION forming part of" Letters Patent No. 730,589, dated June 9, 1903. pplieation filed August 3, 1901. Serial No. 70,713. (No model.)

To a/ZZ wit/011e it may concern..-

Beit known that I, CARL W. WEISS, a citi-A zen of the United States, Whose residence and post-ofce address is borough of Manhattan,- in the city of New York, State otNew York, have invented certain new and useful Improvements in Centrifugal Pumps and Compressors, of which the following is a specilicatiou, reference being had to the accompanying drawings. y

4In the use of centrifugal pumps and com# pressors it is usual when an increase of pressure above the capacity of a single pump is desired to connect two or more single pumps in tandem. This naturally involves amultiplication of expense, considerable door space, and more or less waste of power in the driving-gear, the. n

Itis the object of this invention to provide for the compounding of two or more centrifugal pumps or compressors in a single strncture, so that the disadvantages above mentioned shall be overcome and so that it shall be possible for the manufacturer to keep sections in stock and to supply on short notice a pump or compressor of any desired power.

A further object is to improve the construetion of each single pump or section so as to increase its efticiency and to reduce the cost of manufacture.

The invention will be more fully describedV hereinafter with reference to the accompanying drawings, in which for the .purpose of illustration and explanation of the nature ot the invention 'is illustrated oneconvenient and practical embodiment of the invention.

In the drawings, Figure 1 is a view in longitudinal section of a triple compounded pump which embodies the invention. Fig. 2 is a face view of one of the chamber-sections as seen from the right in Fig. 1, a portion of the chamber-wall being broken out. Fig. 3 is a face view of one of the impeliers as seen from the left of Fig. l.

As shown in the drawings, the shell or casing of the improved pump or compressor is made up of asuction-head A and a dischargehead B with one or more intermediate chamber-sections C, the several parts being formed to lit tightly together and being held together by bolts D, which engage flanges of the suction-head and discharge-head. It will be obpeller.

viens that as many chamber-sections as may be desired can be securely held together by somesuch means as those just described be- Y tween a suction-head and a discharge-head, it being necessary simply to provideV bolts ol' suitable length. Each chamber-section in the construct-ion represented in the drawings comprises an outer wall c, which forms the outer shell of the pump, a partition-plate c',

-which may have a central bearing for the driving-.shaft E, a chamber-wall c2, and preferably a series of webs c3, each of such webs being preferably curved, substantiallyV as shownin Fig. 2, so as to direct inwardly toward the central opening c4 the water or air or other liquid or duid which is delivered through the annular discharge-opening c5 about the periphery ofthe partition-plate c'. The chamber-wall c2 is curved gently outward from the partitiou-plate'to form a pressure-chamber of enlarged section which shall create a minimum of friclion and cause no whirls in the fluid, the chamber-wall being A then inclined inwardly toward the approximately central opening c4, through which the fluid or liquid issues from the pressurechamber c5, which is formed between the partition-plate and the chamber-wall. Preferably, although not necessarily, the partitionplate is cast in one piece with the chamber-wall and the webs c3, being supported by the webs so as to leave its entire periphery -free and separated by a narrow annular space from the wall c, through which the fiuid is delivered to the pressure-chamber in each suctionchamber is disposed the impeller F, which is secured to the driving-shaft E and may have any suitable form. As represented in the drawings, the impeller comprises a central hub or body portionf with radiating curved arms or websf, which have a snug working fit within the suction-chamber, whereby the fluid or liquid delivered to the suction chamber through the central opening a is driven outward toward the periphery of the partition-plate, over which it passes into the pressure-chamber, as hereinbefore described. The impeller is preferably cut away between the webs j", and may also be provided with openings-JC2 to permit the Water to pass to the rear side of the impeller and to establish behind the same a pressure equal to that on its face, so that it shall be balanced and not subjected to a thrust in one direction. It also preferably conforms and lies in close proximity to the partition-plate to avoid the formation behind it of a chamber in which whirls might be created.

The discharge-head B may be formed in any convenient manner, either as a part of the las'tvsection or independently thereof. As shown in the drawings, it is formed independently of the last chamber-(section, so that each chamber section exactly resembles every other. The discharge-head may be provided with a hub or bearing b for the driving-shaft E, and it may also be provided with a suitable discharge-opening b. Each chambersection is formed to iit tightly against the next section of the adjacent head, being conveniently provided, as indicated in the drawings, with a lip c7, which receives the rim of the next adjacent section.

It will be observed that the webs c3 extend from the chamber-wall to the partition-plate, affording no opportunity for the passage of the fluid between the edge of the web and such wall or partition plate, and,furthermore, that the websf of the impeller extend only from the margin of the central opening c4 toward the periphery of the partition-plate, thus avoiding the setting up of a swirling motion of the iiuid before it is acted upon by the impeller, which would be the case if these webs projected into such central opening, the setting up of such swirling motion largely reducing the efficiency of the pump or compressor, if not altogether defeating the purpose of the apparatus.

It will be obvious in view of the foregoing description that each separate pump or pumpsection is itself formed in such a manner as to secure the maximum of efficiency with the minimum of cost and that any number of such separate pum ps or pump-sections can be compounded readily in a single compact pump of greater power, the several sections being fitted together and held tightly by the bolts which engage the lianges of the suction and discharge heads. In such a compounded pump the pressure-chamber of each section delivers the liquid or Huid directly to the next section at the pressure developed by the leading section, so that the pressure developed by the compounded pump is proportionate to the number of sections.

I claim as my inventionl. A centrifugal pump-section, comprising an outer wall or shell, a chamber-Wall supported by said shell to direct the fluid toward a central discharge-opening, inclined webs supported by said chamber-Wall, a partitionplate carried by said webs and having its periphery separated from said shell by a narrow annular space, said webs extending from the chamber-Wall to the partition-plate, substantially as described.

2. A centrifugal pump,con1prisinga suctionhead, a discharge-head, a'plurality of pumpsections fitted directly together and secured between said heads, each of said pump-sections comprising an outer wall or shell, a chamber-wall supported by said shell to direct the fi uid toward a central discharge-opening, inclined webs supported by said chamber-wall, a partition-plate carried by said webs and having its periphery separated from said shell by a narrow annular space, such chamber-wall forming with the partition-plate of the next section a tapering impeller-chamber and said webs extending from the chamber-wall to the partition -plate, a common driving-shaft anda series of impellers, one for each pump-section, secured to said driving-shaft and having webs extending from the margin of the central opening toward the periphery of the partition-plate, substantially as described.

3. In a rotary pump, a series of impellerchambers, rotary impellers in said chambers provided with radial discharge-passages, return-passages in said chambers adjacent to said impellers, each return-passage connecting by a curved way with the next succeeding impeller, lixed curved vanes in said returnpassages, and curved annular passages external to said impellers and return-passages forming communications from each impeller at its periphery to each return-passage, substantially as described.

This specification signed and witnessed this 1st day of August, A. D. 1901.

CARL W. WEISS. In presence of- Lucius E. VARNEY, RosWELL S. NICHOLS.

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